From d72e5f95e70976f9b8bc29a7ace3c354e815ca49 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 12 Aug 2020 13:54:21 +0200
Subject: Add int64 and int64s variable types

---
 libbuild2/variable.hxx | 36 ++++++++++++++++++++++++++++++++++--
 1 file changed, 34 insertions(+), 2 deletions(-)

(limited to 'libbuild2/variable.hxx')

diff --git a/libbuild2/variable.hxx b/libbuild2/variable.hxx
index 99eb3aa..6c78c95 100644
--- a/libbuild2/variable.hxx
+++ b/libbuild2/variable.hxx
@@ -710,6 +710,30 @@ namespace build2
     static const build2::value_type value_type;
   };
 
+  // int64_t
+  //
+  template <>
+  struct LIBBUILD2_SYMEXPORT value_traits<int64_t>
+  {
+    static_assert (sizeof (int64_t) <= value::size_, "insufficient space");
+
+    // Note: in some places we rely on the convert() function not changing
+    //       the passed names thus we make them const.
+    //
+    static int64_t convert (const name&, const name*);
+    static void assign (value&, int64_t);
+    static void append (value&, int64_t); // ADD.
+    static name reverse (int64_t x) {return name (to_string (x));}
+    static int compare (int64_t, int64_t);
+    static bool empty (bool) {return false;}
+
+    static const bool empty_value = false;
+    static const char* const type_name;
+    static const build2::value_type value_type;
+  };
+
+  // uint64_t
+  //
   template <>
   struct LIBBUILD2_SYMEXPORT value_traits<uint64_t>
   {
@@ -730,13 +754,20 @@ namespace build2
     static const build2::value_type value_type;
   };
 
-  // Treat unsigned integral types as uint64. Note that bool is handled
-  // differently at an earlier stage.
+  // Treat signed/unsigned integral types as int64/uint64. Note that bool is
+  // handled differently at an earlier stage.
   //
   template <typename T>
   struct value_traits_specialization<T,
                                      typename std::enable_if<
                                        std::is_integral<T>::value &&
+                                       std::is_signed<T>::value>::type>:
+    value_traits<int64_t> {};
+
+  template <typename T>
+  struct value_traits_specialization<T,
+                                     typename std::enable_if<
+                                       std::is_integral<T>::value &&
                                        std::is_unsigned<T>::value>::type>:
     value_traits<uint64_t> {};
 
@@ -1055,6 +1086,7 @@ namespace build2
   extern template struct LIBBUILD2_DECEXPORT value_traits<vector<name>>;
   extern template struct LIBBUILD2_DECEXPORT value_traits<paths>;
   extern template struct LIBBUILD2_DECEXPORT value_traits<dir_paths>;
+  extern template struct LIBBUILD2_DECEXPORT value_traits<int64s>;
   extern template struct LIBBUILD2_DECEXPORT value_traits<uint64s>;
 
   extern template struct LIBBUILD2_DECEXPORT
-- 
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